To store a plurality of tools of different sizes in a compactly folded state by constituting a grip member in such a way as to support the base ends of a pair of cam bodies rotatably at the center parts of circles assumed according to required curvature, and providing recessed parts for storing arm parts of the respective cam bodies.

Two cam bodies 5, 7 are supported to the front face of a fitting plate 3 of a tool 1 in lateral symmetry with a required space so as to be rotatable around screws 3a. Protrusive cams 5a, 7a of circular arc shape of specified curvature are formed at the base end upper parts of the cam bodies 5, 7, and recessed cam faces 5b, 7b of curvature coinciding with the protrusive cams 5a, 7a are formed on both sides of the base ends. A grip member 9 is fitted to the fitting plate 3 fitted with the respective cam bodies 5, 7, and storage recessed parts 9a for storing folded arm parts 5c, 7c are formed at the fitting part side faces of the grip member 9.